This is a dictionary of deep eutectic solvents water is H2O, DES is the mixture of choline chloride and glycerol. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. just for defining the tag. The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. density is treated as a important property of des. The density of a material varies with temperature and pressure. This variation is typically small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance(with a few exceptions) decreases its density by increasing its volume. The error of density measurement. It is quite important in error propogation. The Si unit of dynamic viscosity, equal to 1 cP(Centipoise). The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. The error of viscosity measurement. It is quite important in error propogation. The Si unit of electrical conductivity, equal to 1000 μS/cm. Electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts the flow of electric current. A low resistivity indicates a material that readily allows the flow of electric current. The error of conductivity measurement. It is quite important in error propogation. Water activity or aw is the partial vapor pressure of water in a substance divided by the standard state partial vapor pressure of water. Using this particular definition, pure distilled water has a water activity of exactly one. As temperature increases, aw typically increases, except in some products with crystalline salt or sugar. The error of water-activity measurement. It is quite important in error propogation. Molar ratio of DES is the ratio of choline chlorid and glycerol. (mole per mole) If the ratio is 0.5 (1:2), then this DES is glyceline. mole fraction of water represents the water content of DES mixture. It is the fraction of water and total amount of all constituents. (mole per mole) If the value is 0, then contains no water. If the value is 1, then it is not DES, but a aqueous solution. Temperature is a physical quantity expressing hot and cold. It is measured with a thermometer calibrated in one or more temperature scales. The most commonly used scales are the Celsius scale (formerly called centigrade) (denoted °C), Fahrenheit scale (denoted °F), and Kelvin scale (denoted K). The kelvin (the word is spelled with a lower-case k) is the unit of temperature in the International System of Units (SI)